<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <common-head></common-head>
  </div>
  <script src="./vue.js"></script>
  <script src="./axios.js"></script>
  <script>
    const CommonHead = {
      template: `
        <div>
          <button ref="btn">按钮</button>  
        </div>
      `,
      created () {
        console.log(this.$refs.btn, 'created')
        
      },
      mounted(){
        console.log(this.$refs.btn, 'mounted')
      }
    }
    Vue.component('CommonHead', CommonHead)
    const vm = new Vue({
      el: '#app',
    })


  </script>
</body>
</html>